Safety appliance for presses.



F. S. ALIANO.

SAFETY APPLIANCE FOR PRESSES,

APPLICATION FILED APR. 1. 1913.

Inventor:

Tm: COLUMBIA PLANOURAPH c0. WASHXNGTON, n. c.

Patented June 27, 1916.

UNITED STATES PATENT OFFICE.

FRANK S. ALIANO, OF NEW YORK, N. Y.

SAFETY APPLIANCE FOB PRESSES.

Application filed. April 7, 1913.

To all whom it may concern:

Be it known that I, FRANK S. ALIANO, a citizen of the United States, residing at the borough of Brooklyn, in the city of New York, county of Kings, and State of New York, have invented certain new and useful Improvements in Safety Appliances for Presses, of which the following is a specification, reference being had therein to the accompanying drawings, which form a part thereof.

My invention relates to safety appliances for presses, and more particularly to a type thereof adapted especially for use upon foot presses.

The main object of my invention is to provide an appliance of this character wherein with the actuation of the foot controlled mechanism, for controlling the punch, a guard plate will be projected between the operator and said punch in a manner to prevent the insertion of the hand or arm of the operator beneath the punch as it descends.

A further object is to provide a safety appliance of this character wherein the guard plate will remain in the protective position during the entire period in which the punch is descending, and will automatically be restored to normal upon the com pletion of the punch stroke so as to permit the feeding of the press while the punch is ascending.

A still further object is to provide a safety appliance of this character wherein the guard plate will be brought to the protective position upon the initiation of the stroke of the foot,controlled mechanism, and will be held in this position during the entire stroke of the punch; and will be instantaneously restored to normal upon the completion of the actuating operation ofsaid foot controlled mechanism actuating the punch, and independently thereof. And a still further object is to provide in an appliance of this character, an oscillatory plate for actuating the guard plate adapted to cooperate with the foot controlled actuating mechanism through a member adapted to be operative to transmit movement from said foot controlled mechanism to said plate upon the power stroke of said actuating mechanism, and to operate independently of said plate upon the return stroke thereof to permit the restoration of parts to their normal Specification of Letters Patent.

Patented June 27, 1916.

Serial No. 259,291.

power stroke of said actuating means, said,

member will be actuated to set said guard; and in such other novel features of construction and combination of parts as are hereinafter set forth and described, and more particularly pointed out in the claims hereto appended.

Referring to the drawings :Figure 1 is a perspective view of a foot press embodying my invention; Fig. 2 is a detail view on a large scale of the safety appliance detached from a press; and Fig. 3 is a detail view of the trip plate upon a still larger scale, illustrating in dotted lines the different positions thereof. 7

Like letters refer to like parts throughout the several views.

In the embodiment of my invention illustrated in the drawings, I have shown it applied to a well known type of pendulum foot press, the frame of which is indicated at a, the head at b, the bolster at c and the punch at d. Pivotally mounted in the head 6 and acting upon the punch d is a foot controlled, pendulous actuating lever e.

Mounted upon the bolster 0 between the punchd and the feeder, is a shaft f having secured thereto a protective guard plate 9 which is adapted to move upwardly and toward the feeder so as to force the hand away from the punch upon the initiation of the power stroke thereof, The shaft 7 is mounted in vertically adjustable studs 7" f and has a crank it at one end thereof through which the shaft f and plate gr receive a timely actuation or oscillation. Pivotally mounted upon the frame a adjacent to the vibratory foot lever e is an oscillatory memher or plate 2', the shaft of which carries a crank j which is connected to the crank it by means of the link 70 through which movement from the member or plate icis transmitted to the guard plate 9.

In order to effectively protect the feeder,

it is essential that the plate 9 should be interposed between the punch and the feeder prior to, or substantially simultaneously with, the initiation of the power stroke of the punch (Z, and to secure this result, 1 provide means whereby the plate 7; will be actuated by means controlled by said vibratory foot controlled actuating means 6 for imparting the desired. timely movement to said member or plate 2'.

In the form of the invention shown, this means comprises a segmental contact plate m pivotally mounted upon the member or plate a which contact plate is adapted to be engaged by the tappet or stud a upon the pendulum e and transmit movement from said JGIlClUlUiTl upon the power stroke thereof to the plate 2' and guard plate 9, and to return to normal independently of said stud. This contact plate m is held against oscillatory movement in one direction by the stud m thereon engaging the top of the member or plate 2' and acting on said stud is a spring m for normally holding said stud in engagement with said plate. Said stud m is mounted eccentrically of the contact plate m.

The radius and degree of the are of the plate m to be used will be determined by the relative position of the stud n, this con tact being made segmental for the purpose of holding the guard g in th raised position until the pendulous lever 6 has completed its power stroke. The plate m is pivotally mounted upon the member or plate 2' so that as said lever e completes its power stroke, the stud n will escape from the plate m, permitting the guard g to automatically return to normal with the plate 2', thus affording ample time for removing the work and feeding the press preparatory to the suc ceeding actuation thereof.

By the construction described, I am enabled to secure an actuation of the guard plate at such a point in the descent of the punch as will prevent the hand of the operator remaining in a position where injury can result, and at the same time the speed of movement of the plate itself is not sufficiently great to injure the feeder, or to place any material additional load upon the lever c. The degree of the arc of the segmental plate m, determines the interval during which the stud 71 may be maintained in engagement therewith without imparting movement thereto, thus holding the plate in the raised position until the return stroke of the lever e.

The operation of the herein described appliance is substantially as follows :VVhen the feeder has inserted the blank below the punch, the lever e is oscillated by the foot in the usual manner. The stud n being normally to that side of the pivotal support of the plate 2' toward the operator, this plate will be normally held against oscillatory movement, the mass of metal in said plate being so distributed, and the guard 9 so set, as to slightly overbalance said plate so as to hold it in engagement with said stud a or permit it to automatically return to normal after each actuation thereof. As the stud 'n oscillates, or vibrates, away from the feeder, it will engage the contact plate m and have a tendency to rotate this plate were it not for the stud m bearing upon the plate 2'. After contact with the plate m, the direction of pressure exerted by the stud a will be such as to rotate the plate 2' about its pivot, thus oscillating the crank 7' and through the link 7r, the crank upon the shaft f, thus oscillating the plate 7 upwardly and toward the operator, and interposing it between him and the punch (Z. With the continued descent of said punch coincident with a continued vibratory movement of the lever e, the stud u will follow the arc of the plate m, thus holding the plate 2' in this position until toward the end of the power stroke of said lever 6. At this time, the stud a will pass from the contact surface of the plate m, thus permitting the weight of the crank 5 and the guard plate 5] to restore the plate 2' to its normal position. This movement interposes the plate on, in the path of the stud n so that upon the return movement of the pendulum c, said stud n will engage said plate m. By reason of its pivotal connection with the plate 2', however, it is capable of such movement as to permit said stud n to pass it and return to its former and normal inoperative position, as shown in full lines in Fig. 3, preparatory to the succeeding operation of the press.

Each operation of the treadle results in' the movement of parts heretofore described, the spring m after each actuation of the plate at serving to seat the stud m upon the plate a and properly position said plate m.

By the construction herein described, it is impossible to actuate the press without setting the protective guard f], and the manner of operating this guard is such as to preclude any possibility of any portion of the hand or arm of the operator remaining under the punch after the blank has been fed.

If the operator desires to reset the blank in the press, or to change the position of the blank-for any reason, the descent of the punch may be readily'checked by pressure applied to the plate (7 at any stage of the movement of this plate, inasmuch as the plate is in direct connection with, and directly under the control of, the vibratory member through which power is applied to said punch. Hence the appliance serves the twofold function of a protective guard eliminating possibility of injury to the operator, by the descent of the punch, and as a supplemental emergency appliance for arresting movement of said punch to avoid imperfect work.

It is not my intention to limit the invention to the precise details of construction shown in the accompanylng drawings, it being apparent that such may be varied witl to be carried by the pendulum of a press and to bear upon. and have movement with, and relatively to, said oscillatory member whereby upon the initiation of the power stroke of the pendulum said oscillatory member will be actuated to set said guard, and said pendulum may be moved independently of the movements of said oscillatory member.

2. A safety appliance for presses embodying therein a guard normally extending across and below the feeding space between the punch and the operator, apivotal support for said guard whereby said guard may be raised upwardly and toward the operator, and actuating means for said guard comprising an oscillatory member mounted adjacent the pendulum of a press, connections between said oscillatory member and said guard, and a stud adapted to be carried by the pendulum of a press and to bear upon and have movement with and relatively to,

said oscillatory member whereby upon the initiation of the power stroke of the pendu lum, said oscillatory member will be actuated to set said guard and said pendulum may be moved independently of said oscillatory member.

3. A safety appliance for presses embody ing therein an oscillatory member mounted adjacent the pendulum of a press, a stud adapted to be carried by the pendulum of a.

press and to bear upon, and have movement with and relatively to said oscillatory member, means adjacent the punch, and operative connections between said means and said oscillatory member, whereby movement of said oscillatory member and the pendulum may be prevented by the hand of the operator.

a. A safety appliance for presses embodying therein a guard disposed between the punch and the operator, and actuating means therefor comprising a vibratory member, connections between said member and said guard, a segmental contact member carricd by said vibratory member,.and means carried by the vibratory foot controlled means for actuating the press adapted to en gage said segmental member whereby said guard will be brought to the protective position upon the initiation of the power stroke of said foot controlled means, and will be held in this position during the continuance of this power stroke.

5. A safety appliance for presses embodying therein a guard disposed between the punch and the operator, and actuating means therefor comprising a vibratory member, connect-ions between said member and said guard, a segmental member pivotally mounted upon said vibratorymember, means preventing movement of said pivotal member in one direction while permitting movement thereof in the other direction, and means carried by the vibratory footcontrolled means for actuating the press adapted to engage said segmental member whereby said guard will be brought to the protective position upon the initiation of the power stroke of said foot controlled means, and will be held in this position during the continuance of this power stroke.

6. A safety appliance for presses embodying therein a guard disposed between the punch and the operator, and actuating means therefor comprising a vibratory member, connections between said member and said guard, a segmental member pivotally mounted upon said Vibratory member, means preventing movement of said pivotal member in one direction while permitting movement thereof in the other direction, a spring acting upon said pivotal member whereby said member is automatically brought to normal, and means carried by the vibratory foot controlled means for actuating the press adapted to engage said segmental member whereby said guard will be brought to the protective position upon the initiation of the power stroke of said.

foot controlled means, and will be held in this position during the continuance of this power stroke.

7. A safety appliance for presses embodying therein an oscillatory guard plate disposed between the punch and the operator and adapted to have movement upwardly and toward the operator, a rotary shaft carrying said guard, a crank upon said shaft, an oscillatory member pivotally mounted on the press adjacent the foot lever for actuating the punch, a crank actuated by said member, a link connecting said last named crank with said first named crank, a stud mounted upon and movable with the actuating foot lever of the press, a pivotal, segmental contact plate mounted upon said oscillatory plate and adapted to be engaged by said stud, means preventing the foot lever, said oscillatory plate Will be In Witness whereof, I have hereunto afactuated to bring said guard into its profixed my signature, in the presence of two tective position through said segmental subscribing Witnesses, this 4th day of April, plate, Will be held in this position While 1913.

said stud is passing along the arc of said FRANK S. ALIANO. segmental plate, and will be permitted to return to normal as said stud passes from contact with said segmental plate.

Witnesses:

CLARICE FRANCE, EUGENE TENING.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

